Resealing trap



May 19, 1925. 1.537,955 H. J. Lul-'F RES BALI NG TRAP Filed June' 9. 1922 2 Sheets-Sheet 1 Figi.

H. J. LUFF.

RESEALING TRAP Filed June 9, 1922 2 Sheets-Sheet 2 Patented May 19, 1925.

HENRY' :n wie, 0F CLEVELAND, dem,

PATENT As'srenonf yBY 1 nss'rnlviniirs, To

Mn'rtYA. LU'FF', OF CLEVELAND, 01H10.U

RES'EAMNG TRAP.'

Application filedy .Tune 9,'

.discharge enters directly or indirectly intoa` building' sewer-or' building drain; and I do hereby declare that the following is' a Jfull', clear, und exact' description` ot the invention7 which will enable (')tliers'slzilledfin the art to which: .it'appert'ains to ineke' and use thef suine.

Most' municipal1 drainage regulations require certain n'iiniinuni standards of sealing, scouring and resealingveiiitiency t'o he maintained' in traps, under the maximum conditions ot installation pe'rniissilole;l and it is with a'view` to fully meeting su'eh requirements that the' present re'sealing trap has been designed. y

It is recognized hy health oneials that: the water1 rsealing t "applaeed under ixtiir'es u'sed to discharge liquid wastes into the building drainage systein a'cts asv a sentinel to` guard againsttlie iniow of noxious and gerrnlude'n sewer ai`r` into holnes'and buildings, and therefore tlie'reqiiireinent for' the highest standird o'f'eiiticiency is justified on the ground' ot puhlic health. Experiencev lias'tauglithealth officiels thft the piactiee' ot relying wholly upon beck-vent or .re vent pipes tol naintain the" water in ui'iit'orin diameter traps is fraught with coni siderble danger and expense, since they frequently" fail to' function at Pthe tinfxes of? greatest` need; "their ineiiiciency`lr heingi maniL tested loyY theftact that in pr'o'tractedA iti-eeningteinperatures the vapor i'ornhot witten disclitirged into the )drainage system" upfthroiigh these hack-venti or re-vent p ipe's'and` at the peint where the latterL eS/Q tend through theV roof this iiapor freezes andE theI p'ipe is gradually' reduced in) area and often completely frozen oven Moreover, in o'rde'r to prevent birdsifi'oin using tliese'rodt pipesas nests orl'perching thereon, wire baskets are' frequentlyy placed over"` thein. an 3ltl1`eseA 'wire baskets reduce the area, so that it is practically impossiblel to prevent: the no1'i`tunctionin'g'o't these root'vvent's fi-in" frost closi'irevor during" ie'e storins.

traps have been designed to prevent conipleteI trap 'usihplionalg'e,` which haine pli'tes, secret p irttins',4 detleetors,V s'tandpipes', and nn'praetieal enlargeinent ot theout-let leg` land' depth of seal', have'been used; huttliese waste, thusA pieventingv seht-scourng` eliiciency'; alsotgatliered'liaiii-andtliiit in suelta` nianner as to produce capillary attraet'ion` of the liquitland coin"sequentT .siphoniig'e of the 4trapy seal; also the. solidsr`" a'inedb created a foul odor inltlietrap'"sealigiandfjin inany ysuchtraps a detect in the'castinglias permitted the enti re se al` of: the trap' to I leali unnoticed into'the ivas`tepi'p'e,y 'or' sewer a'ii",y

to' leal; over the seul ot the trap' intotlie roo'in.A y f To'pi'ovide a relseziling trap' alliipt'ed'tofhe locatedl beneath the floor ot the r'ooin coni taining the ftur'e or fixtures which it4 serves wliieh willl olivizi'te all ot' the abovef'noted defects and ohjections"has been the'inain p'urpolseand object ot the present invention. which lutter,H in one 'practicall and approved einhodinient thereof, i's'liereinatter 'fully deserihed and disclosed in thel accompanying drawings, in whichp Figi' l is ak vertical sectionl elevation of an undernoor' trapl einhody'ing my" invention;

Fig.' 2 is a Verneuil See/nouer elevation tl'iro'ugh' the discharge" leg aindoutlet in zt plane 'at' right angles to the plane of' Fig.` l, and showing the use of aninclined inf# flow' leg in' lieujo'f tlie verticell Of'Fg- 1; 11

Figd 3 is a top pln view' of Fig. 2*; A

Fig. l'is'aftop plinfvie'w'ofthe remet/*able plug which close/sf the to'p opening-l of the tr'ap g Fic'. oo'rj cap; and

let.`

inflow leg 5 vis a top plan view of a=re1nov`able The' re's'ealing .trap of the present inve`n-v rig. e Smeg a' modifieui fbi-ni? or nep nev the fiXture isdischarged and atfthe saine time provide an opening or flow passage be-l v tween them of an area substantially equal lll one inch depth.

to the larea of the discharge opening. In my aforesaid companion application I have disclosed and broadly claimed this feature, and I have also shown therein aclean-out and inspection openinglocated in the inclinedbottoin and side wall of the discharge leg closed by a removable plug.y In the trapy of my present invention I provide a cleanout and inspection yopening at the uppery end ofthe trap directly above the laterally directed discharge opening; suoli clean-out*k and discharge opening permitting the inserf .In Fig. v1 the trap is 'shown as comprising two castings, one of, which formsv a substantially vertical inlet leg` and bottom bend 11, and the other of which comprises the discharge leg 12 of approximately twice the` diameter of the inlet leg l0. The upper free end of the bottom bend 11 is taperedl .out-

wardly to the vdiameter of theV discharge' legl 12 and is provided with an integral tapped collar 13` forming a union with the threaded lower end of the discharge leg 12,

the usual sealing and packing material of course being employed, or any vother approved form of union connection being sub-v stituted. v

In F ig. 2 I show an inflow leg 10 coupled to a bottom bend 11"l bythe threaded joint 14,; said inflow leg 10a being inclined siib stantially o from the vertical and adapted for use with comparatively longhorizontal fixture connections to afford In Fig. 6 I show a horizontal inlet leg l0" 'coupled to the bottom bend 11b; such a construction being adapted for a short horizontal connection to a bath tub with a low down outlet, this design enabling the -necessary depth of seal to beobtained from the top,

of the floor.4 5 Describing now the discharge or outlet portioiiof the trap wherein the noveltyl'of l Ui the present invention mainly resides, this is the .same `in Figs. 1 and 2. 15 designates a horizontallyT directed tapped discharge opening at the upper end of the discharge leg l2. `*At the level of the bottom of'said opening are formed a pair of horizontal segmental 'Y baffle plates 16, vbeti'veen the opposed edges ofgwhich is formed a substantially rectangular restricted opening orflow vpassrsage 17,

through which the disch arge fiows on its way to the discharge outlet 15. Ontheiipper end of' the discharge leg of the trap just above the discharge openingl is a collar 18 adapta seal of at leastl ed to be fitted toa suitable opening in the floor 19 and internally threaded for `a portion oi its depth as shown' at 20.- On the' lower f side of said collar are formed a pair of opposed crescenteshaped internal flanges 2l, the inner edges of which are joined to the straight inner edges of the segmental bafiie .plates 16 by tapered walls 22, each of said walls having a maximum inclination from the vertical at its center, as shown in Fig. 2,

and gradually'approaching the vertical toward its ends, as shown invFig. l.

23. designates a threaded pliigadapted to screw tight-ly into the collar 18l and formv a closure for the kclean-out openingformedr by the said collar. To facilitate application and removal of this plug by a suitabletool, said plug is provided with a plurality of spaced .j

upstanding lugsjZl on its upper si'dezloc'ated adj accnt to its periphery.y 4,2o-designates a' removable floor or escutcheon plate lto cover and conceal the clean-ont plug or closure 23@A l This plate 25 isfforined on its under side with depending lugs 26 so positioned as to stra-delle theliigs 24- of the plug `and Lserving to center the plate on the plug and lock the plate againstV rotation.

Briefly describing the functional features l and advantages ofthe described construction, lthe baliie plates 1G and restricted flow passage 1'? serve, while a dischargeis taking place, to retain in the discharge le'gof the trapv andA against the siphonic action, siify access through ls aid floor passage for the fingers of the inspector to ascertain ifthe' under sides ofthe baffle plates are vsmooth.

and free from accumulated matter, and )to clean them when necessary. Furthermore, the downward tapering of the walls above the baffle plates 'and opposite the dischargey opening creates a chamber ofininimum ca pacity for the water flowing through the opening 17, to fill and overflow through the clean-out opening when a discharge takes place, in the event that said opening isl not closed by its plug, or is leaky, thereby afford# ing telly-tale evidence that the trap requires attention. Manifestly, the connection of the inflow leg and bottom bend 'of thetrap to the discharge leg by the threaded joints shownv or equivalent union connection permits the swinging of the inflow leg to any desired position around the vertical axis of the discharge'leg, thus Ladapting the structure to varying conditions of installation. Agaimvby reducing the diameter of the iiiflow and bottom bend portions of the trapy relatively-to the diameter of the discharge portion, a minimum amount of water is required below the "bottom of the trap seal, so that the water which is held in suspension when siphonic action takes place b thedeilectors or bailles 16 will quickly ow back and lill the portion below the sealand secure thel greatest depth oi reseal I have herein shown the elongated opening or iiow passage 17 disposed at a right angle to the axis oi the discharge opening 15, but I do not confine its use to that parA ticular design, since it may be used with equal eiiiciency when disposed parallel with the axis oi the discharge opening or at any other angle thereto. While I show the dislcharge extending at an angle oi 90 to the discharge leg oi the trap, itis obvious that the discharge may with equal eihciency extend at any angle from 900 vto the vertical, or may be oii'set to bring it into vertical alignment with the inflow leg.

The term resealing7 as used herein is understood in the art by most persons skilled therein, but may be brieily explained as iollows. lhen siphonic action takes place, either by the length oi the vertical or down-v ward grade oi the fixture discharged, or the passage oi' waste 'from a higher lixture producing a vacuum,` a part oi the trap seal is siphoned out until air is admitted through the inlet, aiter which the water held in suspension while siphonic action is in progress, reiills and reseals the trap to a saie depth. To eilect the holding oi suiiicient water in suspension, the relative enlargement o't the discharge leg oi the trap and the baiiles 16 are contributing iactors oi prime importance and eiiiciency.

I claim- 1. An under-floor resealingtrap ior the discharge lines oi plumbing fixtures having a discharge leg oi greater diameter than the inilow leg and comprising coaxial lower and upper vertical portions oi lesse-r and greater cross-sectional areas at their upper ends respectively, said upper portion being open throughout thel entire areaioi its upper end to :form a hand-hole and having a lateralk discharge opening, a pair oi oppositely diss. posed horizontal segmental bailie plates located transversely oi the upper end of said lower vertical portion oi the discharge leg and forming between them a central substantially rectangular ilow passage having said baiile plates, a discharge opening in the side wall oi said overflow chamber, a collar continuous with the upper end oi said overflow chamber adapted to lit an opening'in the floor, and aremovable closure ior the upper end oi said collar.

i 3. An under-floor resealing trap for the discharge lines oi plumbing fixtures having a discharge leg comprising a vertical cylindrical portion, oppositely dispo-sed horizontal segmental baille platesextending across the top oi said cylindrical portion and iorming between them a restricted ilow passage, an upwardly and outwardly flaring overiiow chamber extending upwardly from the inner edges oi said baiile plates, a discharge opening in the side wall loi saidf overflow chamber, a threaded collar continuous with the upper end oi said overilow chamber adapted to iit an opening' in the floor, and a.

threaded plug iorming a removable closure ior the upper end of said-collar] HENRY J. LUFF. 

